There are girl groups, and then there are The Supremes. In 1964, Florence Ballard, 21, Diana Ross, 20, and Mary Wilson, 20, became Motown's brightest stars, notching their first No. 1 single on the Billboard Hot 100, "Where Did Our Love Go." During the next five years, 11 more chart-toppers followed, making the trio the American group with the most No. 1s on the chart. The only group with more is England's Beatles, with 20 (the most of any act).